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Faman39

  • 3 years ago

The volume of a cube is 144 cubic meters. What is the volume of the square based pyramid with the same side length and height? 16 m3 48 m3 432 m3 1, 296 m3

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  1. Faman39
    • 3 years ago
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    @baldymcgee6 can you able to help me ?

  2. baldymcgee6
    • 3 years ago
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    What is the formula for the volume of a cube?

  3. Faman39
    • 3 years ago
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    ah, 1/2 ?

  4. baldymcgee6
    • 3 years ago
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    The volume of a cube is: V = s^3

  5. Faman39
    • 3 years ago
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    last one, right?

  6. Faman39
    • 3 years ago
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    No, i think i m wrong

  7. baldymcgee6
    • 3 years ago
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    you are wrong.. :) v = s^3 144 = s^3 s = cbrt(144) V_pyramid = (area of base)(height)*(1/3)

  8. Faman39
    • 3 years ago
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    So you think it is third one ?

  9. baldymcgee6
    • 3 years ago
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    nope..

  10. Faman39
    • 3 years ago
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    So... i dont really get this one

  11. baldymcgee6
    • 3 years ago
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    that's okay.. i will draw it up for you

  12. ghazi
    • 3 years ago
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    |dw:1351376778451:dw| does that help fatima? @Faman39

  13. Faman39
    • 3 years ago
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    No :(

  14. ghazi
    • 3 years ago
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    oops wait|dw:1351376998205:dw|

  15. ghazi
    • 3 years ago
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    this is what your question says

  16. Faman39
    • 3 years ago
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    cube but i just dont understand how will i find the answer of the question

  17. baldymcgee6
    • 3 years ago
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    http://screencast.com/t/4fRd0GNYnN

  18. ghazi
    • 3 years ago
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    volume of pyramid = 1/3*breadth*breadth*height breadth and height are same in this case and is equal to--- since side cube = 144 x^3=144 x=5.24

  19. ghazi
    • 3 years ago
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    now you can do it

  20. ghazi
    • 3 years ago
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    volume = 0.333*5.24*5.24*52.4 since it's a cube so breadth= height

  21. ghazi
    • 3 years ago
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    @Faman39 now?

  22. Faman39
    • 3 years ago
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    You divide the 144 with 3, right?

  23. ghazi
    • 3 years ago
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    it will be 47.923 = 48

  24. ghazi
    • 3 years ago
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    no, i found side of cube by this formula \[(side)^3=144----side=\sqrt[3]{144}\]

  25. ghazi
    • 3 years ago
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    and volume of pyramid here, \[V=\frac{ 1 }{ 3 }*side*side*height\] and side=height (given) and 1/3=0.3333

  26. ghazi
    • 3 years ago
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    clear? @Faman39

  27. Faman39
    • 3 years ago
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    Much more :)

  28. ghazi
    • 3 years ago
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    cool :)

  29. Faman39
    • 3 years ago
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    Thank you so much @ghazi ! :)

  30. ghazi
    • 3 years ago
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    :) YW :)

  31. Faman39
    • 3 years ago
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    Thank you everyone coming here for help

  32. baldymcgee6
    • 3 years ago
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    @Faman39 you asked for my help and I explained it to you and drew you a picture...

  33. ghazi
    • 3 years ago
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    @baldymcgee6 should be thanked :)

  34. Faman39
    • 3 years ago
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    Yeah, you helped me too @baldymcgee6 ! :)

  35. Faman39
    • 3 years ago
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    Thank you so much @baldymcgee6 ! :)

  36. Faman39
    • 3 years ago
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    You all are truly amazing guys :) love you all

  37. ghazi
    • 3 years ago
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    mention not :)

  38. Faman39
    • 3 years ago
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    thanks again all of you :)

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